#!/usr/bin/env python3
# -*- coding=utf-8 -*-
# 题目：一个最优美的图案。


def f1():
    import math

    class PTS:
        def __init__(self):
            self.x = 0
            self.y = 0

    points = []

    def LineToDemo():
        from tkinter import Canvas
        from tkinter import mainloop

        screenx = 400
        screeny = 400
        canvas = Canvas(width=screenx, height=screeny, bg="white")

        AspectRatio = 0.85
        MAXPTS = 15
        h = screeny
        w = screenx
        xcenter = w / 2
        ycenter = h / 2
        radius = (h - 30) / (AspectRatio * 2) - 20
        step = 360 / MAXPTS
        angle = 0.0
        for i in range(MAXPTS):
            rads = angle * math.pi / 180.0
            p = PTS()
            p.x = xcenter + int(math.cos(rads) * radius)
            p.y = ycenter - int(math.sin(rads) * radius * AspectRatio)
            angle += step
            points.append(p)
        canvas.create_oval(
            xcenter - radius, ycenter - radius, xcenter + radius, ycenter + radius
        )
        for i in range(MAXPTS):
            for j in range(i, MAXPTS):
                canvas.create_line(points[i].x, points[i].y, points[j].x, points[j].y)

        canvas.pack()
        mainloop()

    LineToDemo()


f = f1
if __name__ == "__main__":
    f()
